The A-Team were an elite crack commando unit that escaped from a maximum security prison because they were innocent of the crimes they were charged with. They drove around in their black van, helping people out. Technically they were mercenaries but they didn't really charge nice people who genuinely needed their help. The team was led by Colonel Hannibal Smith, master of disguise played by George Peppard. Then there was BA Barracas, played by Mr T. BA drove the van and was a mechanic, too, helping underpriveliged children in his spare time. The good-looking one of the team was Templeton Peck, better known as Face, who never acted like he had ever been a soldier (played by Dirk Benedict). The fourth member of the team was Murdoch, played by Dwight Schultz. He was the best pilot around, but certified insane, although it always seemed that Murdoch used the insanity as an excuse and a shield to hide his real self behind.The people loved the A-Team, especially their reporter friend, Amy, but they did have enemies, most notable of which was Colonel Decker - a very driven and perhaps slightly crazy man. One of my favourite Decker moments is when Hannibal, dressed as a giant crocodile, lures Decker and his car into a channel through some water, and then releases the flood gates. I wonder if the analogy to Moses crossing the Red Sea was deliberate?
Another show with the lovely Dirk Benedict in, the story revolved around the plight of the Galactica, the last Battlestar of a bunch of planets named after starsigns. The Cylons wiped everyone out, and somehow only the Galactica escaped, under the command of Commander Adama. With everyone on their 12 planets dead, they decided to head for the fabled 13th planet; Earth. On the way they encountered all sorts of problems: Cylons, traitors and, the worst enemy of all: Muffit the Daggit.
This TV series follows on from the film, although with an obligatory change of cast. The main character, Buffy Summers (Sarah Michelle Gellar) goes through something of an overhaul, too, to bring her more in-line with the late 90s, while still keeping her character the same. The series is great, a good movie spin-off, and is really funny while still keeping you on your toes. Joss Whedon doesn't fear to change and develop the characters, keeping the whole thing as reality-based as possible
This is probably the most exciting adaption of the Robin Hood tale I've ever seen, although it is still a little flexible with the truth and reality! In the first two seasons, Robin Hood is played by Michael Praed, and the story follows him and his merry men as they thwart the Sheriff of Nottingham repeatedly. However, they have another enemy: Simon WHO, a sorcerer of no mean power. Contrary to the traditional tales, they are aided by Herne the Hunter (Robin is chosen as his son) and this allows for a slightly more mystical layer to be added to the story. 
It was only a matter of time before this TV show wormed its way into my favourites list. I loved the film, always wanted to be Daniel Jackson, and then the TV series was of such high quality - it was inevitable. It's so easily picked up without needing to see previous episodes, which is a flaw the majority of other TV shows exhibit sooner or later. The characters are likable and consistent and nothing fundamentally changes, although a great deal can change through an episode. The team: Jack O'Neill, Samantha Carter, Daniel Jackson and Teal'c initially get together for a variety of reasons, but after a while they gain a unity of purpose. And their group dynamic is so realistic and well portrayed that you want to believe it's real. 
Actually, citing this as one of my favourite shows is just an excuse to post up a picture of my favourite tennis player. I've been following his career since his first Wimbledon, and watched him fail so many times... when he won it I had to stop watching the second half because I thought I would jinx him to lose! My favourite tennis player is Goran Ivanisevic, although I do simply like the sport, crap at it though I am.